词汇	灾变事件
释义	灾变事件 catastrophic event
随便看	rotation plough land rotation pneumatic vibrator rotation position sensing rotation potential rotation power rotation precision rotation priority rotation process rotation profile rotation projectile rotation-projection rotation quantum number rotation radio beacon rotation radiography rotation radiotherapy rotation radius Rotation-speed rotation speed control rotation speed feedback control rotation speed fluctuation rotation speed for cast rotation speed identification rotation speed measurement rotation speed of hard disk rotation rate